A pensioner was seriously injured after being assaulted and robbed of the 4,000 euro (£2,895) he had just exchanged ahead of a holiday.
Police described the attack on the 84-year-old man as "sickening" and said they suspect the person responsible had targeted the victim, following him from the money exchange shop he had just been to.
The man remains in a serious but stable condition in hospital, the Metropolitan Police said, and is awaiting surgery for a broken leg after the incident at Wades Hill, Enfield, north London on Saturday afternoon.
The suspect, described as an Eastern European man in his mid to late 20s, of medium build with short black hair and a moustache, left the scene in a grey Audi car.
Detective Constable John McCarthy, from Enfield CID, said: "This was a vicious and sickening attack on a vulnerable elderly man who had exchanged money ahead of a holiday with his wife.
"There is a strong indication that he was targeted and followed by the suspect from the money exchange shop in Oakwood."
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